Question
How is a lens different from a mirror?
✓
Answer
A mirror has one reflecting surface. By reflection of light, it forms an image of the object placed in front of it. A mirror is not transparent. A lens has two surfaces that form an image by refraction of light. A lens is transparent.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The yeast cells fail to multiply in water but they multiply rapidly in sugar solution. Give one reason for it.
| Plant/Microbes | Functions |
| (1) Pteris vitata | ______________________ |
| (2) Pseudomonas | ______________________ |
| (3) ________________ | Absorption of uranium and arsenic |
| (4) ________________ | Absorption of radiations of nuclear waste |
What current will be taken by a 920W appliance if the supply voltage is 230V?
In the reaction represented by the equation:
$\text{MnO}_2\ +\ 4\text{Hl}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{MnCl}_2\ +\ 2\text{H}_2\text{O}\ +\ \text{Cl}_2$
→$\text{MnO}_2\ +\ 4\text{Hl}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{MnCl}_2\ +\ 2\text{H}_2\text{O}\ +\ \text{Cl}_2$
- Name the substance oxidised.
- Name the oxidising agent.
- Name the substance reduced.
- Name the reducing agent.
State the following statements into chemical equations and then balance them: Zinc reacts with sulphuric acid.
Observe the figure and answer the following:
(i) Lack of management of which factor is shown in the picture?
(ii) How can that factor be managed with the help of microbes?
(iii) How are the oil spills in oceans cleared?
A potential difference of 250 V is applied across a resistance of 1000 Ω in an electric iron. Find (i) the current and (ii) heat energy produced in 12 sec.
What are hydrocarbons? Explain with examples.
State one practical application the use of such a lens with the object in position (i) and (ii).
Methanol.